"My inner life was being drowned. I've worked with Richard Harris, Gary Oldman, all those actors who went crazy when they were young, and I always wanted that," Radcliffe told Parade of his decision to quit drinking.

"The idea of that kind of life and chaos was always so appealing to me. Unfortunately, the way I do it, there is no romance to it! There is nothing glorious or triumphant about it - it was pathetic, boring, and unhappy."

Radcliffe went on to say that he understands that his popularity may wane with time, adding: "Yes. But it's reality, not fear. It will happen, and I have accepted that. In a way it's a great relief that I will never, ever do a film as successful as the Harry Potter series. But neither will anybody else. Or it will take them a long time."